One example would be the following:
II Peter chapter 3
[8] But, beloved, be not ignorant of this one thing, that one day is with the Lord as a thousand years, and a thousand years as one day.
[9] The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.
[10] But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up.
[11] Seeing then that all these things shall be dissolved, what manner of persons ought ye to be in all holy conversation and godliness,
[12] Looking for and hasting unto the coming of the day of God, wherein the heavens being on fire shall be dissolved, and the elements shall melt with fervent heat?
[13] Nevertheless we, according to his promise, look for new heavens and a new earth, wherein dwelleth righteousness.
We often hear about "the coming day of God" or the coming "day of the Lord", and it is not a literal 24 hour day.
Instead, in this precise context, Peter said that we must not be "ignorant of this one thing, that one day is with the Lord as a thousand years, and a thousand years as one day". Here, Peter was alluding to what the psalmist had written:
Psalm 90
[4] For a thousand years in thy sight are but as yesterday when it is past, and as a watch in the night.
Revelation chapters 19, 20, and 21 give us the easiest-to-read chronological order of events of this "day" or 1000 year period, from its beginning to its end, but it is outlined elsewhere in the Bible as well.